The one with the extra leg. Bottom right, it just has threads to bolt tightly to the frame rather than swing.
I believe the secret is the frame and bolt squeezes to the collar and the bushings and swingarm pivot freely on it.
If I am correct, the flanges on the bronze bushings replace the stock cupped washers so I need to just be sure to replicate the stock width including the bushing flanges. Right now, the swingarm fits tightly with no flanges or washers.
I guess what I'm wondering is, will the collar be ok unsupported in the middle?